Patchwork [13/25] hw/9pfs: Add yield support to lstat coroutine

login
register
mail settings
Submitter jvrao
Date May 12, 2011, 8:57 p.m.
Message ID <1305233867-4367-14-git-send-email-jvrao@linux.vnet.ibm.com>
Download mbox | patch
Permalink /patch/95374/
State New
Headers show

Comments

jvrao - May 12, 2011, 8:57 p.m.
From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
---
 Makefile.objs            |    2 +-
 hw/9pfs/cofile.c         |   50 ++++++++++++++++++++++++++++++++++++++++++++++
 hw/9pfs/virtio-9p-coth.h |    1 +
 3 files changed, 52 insertions(+), 1 deletions(-)
 create mode 100644 hw/9pfs/cofile.c

Patch

diff --git a/Makefile.objs b/Makefile.objs
index 614bcaf..83d30bd 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -297,7 +297,7 @@  hw-obj-$(CONFIG_SOUND) += $(sound-obj-y)
 9pfs-nested-$(CONFIG_VIRTFS) = virtio-9p.o virtio-9p-debug.o
 9pfs-nested-$(CONFIG_VIRTFS) +=  virtio-9p-local.o virtio-9p-xattr.o
 9pfs-nested-$(CONFIG_VIRTFS) +=   virtio-9p-xattr-user.o virtio-9p-posix-acl.o
-9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-coth.o cofs.o codir.o
+9pfs-nested-$(CONFIG_VIRTFS) += virtio-9p-coth.o cofs.o codir.o cofile.o
 
 hw-obj-$(CONFIG_REALLY_VIRTFS) += $(addprefix 9pfs/, $(9pfs-nested-y))
 $(addprefix 9pfs/, $(9pfs-nested-y)): QEMU_CFLAGS+=$(GLIB_CFLAGS)
diff --git a/hw/9pfs/cofile.c b/hw/9pfs/cofile.c
new file mode 100644
index 0000000..860b060
--- /dev/null
+++ b/hw/9pfs/cofile.c
@@ -0,0 +1,50 @@ 
+
+/*
+ * Virtio 9p backend
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ *  Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "fsdev/qemu-fsdev.h"
+#include "qemu-thread.h"
+#include "qemu-coroutine.h"
+#include "virtio-9p-coth.h"
+
+
+typedef struct V9fsThLstatState {
+    int err;
+    V9fsState *s;
+    V9fsString *path;
+    struct stat *stbuf;
+    V9fsRequest request;
+} V9fsThLstatState;
+
+static void v9fs_th_do_lstat(V9fsRequest *request)
+{
+    V9fsThLstatState *vsp = container_of(request, V9fsThLstatState,
+                                         request);
+    vsp->err = vsp->s->ops->lstat(&vsp->s->ctx, vsp->path->data, vsp->stbuf);
+    if (vsp->err < 0) {
+        vsp->err = -errno;
+    }
+}
+
+int v9fs_co_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf)
+{
+    V9fsThLstatState vs;
+    vs.s = s;
+    vs.path = path;
+    vs.stbuf = stbuf;
+    vs.request.func = v9fs_th_do_lstat;
+    vs.request.coroutine = qemu_coroutine_self();
+    v9fs_qemu_submit_request(&vs.request);
+    qemu_coroutine_yield();
+    return vs.err;
+}
diff --git a/hw/9pfs/virtio-9p-coth.h b/hw/9pfs/virtio-9p-coth.h
index 57f30ff..aedeba9 100644
--- a/hw/9pfs/virtio-9p-coth.h
+++ b/hw/9pfs/virtio-9p-coth.h
@@ -56,4 +56,5 @@  extern off_t v9fs_co_telldir(V9fsState *, V9fsFidState *);
 extern void v9fs_co_seekdir(V9fsState *, V9fsFidState *, off_t);
 extern void v9fs_co_rewinddir(V9fsState *, V9fsFidState *);
 extern int v9fs_co_statfs(V9fsState *, V9fsString *, struct statfs *);
+extern int v9fs_co_lstat(V9fsState *, V9fsString *, struct stat *);
 #endif